Two appliances and crews from High Wycombe and one from Beaconsfield attended, along with an officer.
Smoke was issuing from an outbuilding, measuring around thirty metres by ten metres, when they arrived.
The firefighters used two sets of breathing apparatus and one hose reel. They also used a positive pressure ventilation fan to help clear smoke.
The building was approximately 10 per cent damaged by fire and 100 per cent damaged by smoke.